<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="../../js/demo02.js"></script>
    <script>
        document.writeln("疑是地上霜")
    </script>
</head>
<body>
    <script>
        document.writeln("举头望明月")
    </script>
    <button onclick="alert('我是一个按钮')">我是一个按钮</button>
    <a href="JavaScript:alert('我是一个超链接')">我是一个超链接</a>
</body>
<script>
    document.writeln("低头思故乡")
</script>
</html>